{
  "manageEntity": {
    "action": "Save",
    "entityId": "152867001",
    "entityType": "Track",
    "nonce": "0x283989e8014183b7212503bd4bca100dee233ad38db59d8de9a56097e2ab5493",
    "signature": "0x0821cdc9db2bd8e7269bba18cb9f8c5852d65d917309629aafaae0edfe9f269717953542ebe37537636e8ca350dc9e025b09e7432b337c54c11ca36d1dd8faf51c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}