{
  "manageEntity": {
    "action": "Save",
    "entityId": "192807",
    "entityType": "Track",
    "nonce": "0x2230eea5b516e55b57649028d510693598778ee7c0e97438893146454f2f71be",
    "signature": "0x5f48d6cdfbf13130febaffe19945a0f920d27eb49368b0079d2224a74913af6d594373e1157d3ee9080cc283a1a334dfd354be05919e364d7eb0d3c4c6595fed1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}