{
  "manageEntity": {
    "action": "Save",
    "entityId": "846921991",
    "entityType": "Track",
    "nonce": "0x832c1ec03045334a6ab28d80abc145e652c42f9cdea120d331391f5a6effd7d8",
    "signature": "0x067b5b1e682a3a7424238447ab8449dd5509543760960f55f112f4209b37ea0e467e805dff895541532235239577f7bf8ce6d1eb3c1541c2dcb8aa03a467b7cd1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}