{
  "manageEntity": {
    "action": "Save",
    "entityId": "888872954",
    "entityType": "Track",
    "nonce": "0xcfd4b405c70b8a2b62fc9e1d51306904d87e5695aff25611d3119c29f01e17b2",
    "signature": "0x9d6a5f47269d1437a8edb7f96dc90289ae4f47cc54815b4ea88f209d4e1b677d051bfaffe104ef25cf7da773d2cabbd548836ce4f7faaa4856e0679008cc04831c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}