{
  "manageEntity": {
    "action": "Save",
    "entityId": "1097887165",
    "entityType": "Track",
    "nonce": "0x3a81883c6671046357dfd117d55f0c71b76cfa88b38fa1a3ebc573f6ae61e978",
    "signature": "0x1202539c8bd301a5cf8d920846417fddccfc55ccea214c97b3bf8d9e950fc5314575f6ad55643ceefb0fbf2b29be0a4494b84a704d91d05995d8b0b5b00729ff1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}