{
  "manageEntity": {
    "action": "Save",
    "entityId": "35857938",
    "entityType": "Track",
    "nonce": "0x9684553e37eaa124f7ae0950db48595a0247ac417da9fbb7605346cf535fa765",
    "signature": "0x7c416f5a4da7a8f221c3434f906e6e32cc0e403b7bbd94cc480f35e1dcb79d895c1dc9248b83ec2606cd1d4d465dc336046bc69751424fcb3535318e084d3fd51c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}