{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769134317",
    "entityType": "Track",
    "nonce": "0xef62b916622bec2e36f0ebe98830b5e8d9ad275b9e2b2e81875dd164b42b320b",
    "signature": "0x5dfb2087a325ecc59edb25b3c65da3d207fdda1405ab111a8d28d4041e661795106ddfac474cd6b5ea879a2b3eaa8d9072deafb50bc1a0d434407a939a6232c01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}