{
  "manageEntity": {
    "action": "Save",
    "entityId": "1522638528",
    "entityType": "Track",
    "nonce": "0x241843f9a1faa8294294907d3e7bfbbfb1088f3c496b7caf1ba8b1a5cf46910d",
    "signature": "0xd30eefe5d8630876b811f476d52df1e0e3def881b49ce2cc48e1612c2b1c983f313be12b3c81f3ff2430fce6cb31d221ec314a59c24355716f23dde973c084711b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}