{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122430",
    "entityType": "Track",
    "nonce": "0xdf2e3007770053e89b1c5e8914a7cda3c7de9e9830eba7a35208e882a60356c4",
    "signature": "0x7667b086afb9bad077410597876f57f4b31979def52214b83e4ae735465487251eb1a3da58da2f2f04b73bfb0aaf639a5713df0d23ee462c3b887c32849ed0491c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}