{
  "manageEntity": {
    "action": "Save",
    "entityId": "1422228665",
    "entityType": "Track",
    "nonce": "0x894142e20252688e80a6ea02028872eedd148f3d35731d8b8a23b84e0f466c63",
    "signature": "0xd1ac14ef00a0fa75cd815a3ef517c3e9a2fb7d6da95bd9b45fc1d5952d46e2bc37721ff02c7c95b0721348cb98302e68c613fec2f6a4609f02697b1c8bb719b01b",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}