{
  "manageEntity": {
    "action": "Save",
    "entityId": "1062543",
    "entityType": "Track",
    "nonce": "0x5e0b19b205b416322e91802619be7e22557eeb17148f03cb0dba56d0363dd911",
    "signature": "0x8d61e694b0664399cc518e212ed3c62869b4d307b38b2b810219f9acefd6b70c43771b7373cbc2d30f2e34124d241f9acb52313882f29b0bb24f4c07effc5e981b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}