{
  "manageEntity": {
    "action": "Save",
    "entityId": "223785520",
    "entityType": "Track",
    "nonce": "0x7d63675a3489a85e1e711486535a12136ed949e05d3c7c22f19df6cc7e09a02c",
    "signature": "0x162f0b7c59a011f6161e23669ad5f9f82d2d3a68ae0ac699bb5e7b490a342da565eb698f8b2c7b7f34d87318acd5441c02f5fc7b358bff652d3777c99688cc7d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}