{
  "manageEntity": {
    "action": "Save",
    "entityId": "831101",
    "entityType": "Track",
    "nonce": "0x9ad4a24788fb94ce66e905b8136bfdc3810610e1b907c36446b0b01226af1d75",
    "signature": "0xdb420eb438a83a1a405604eb663a0e3e6a796839fd0c5741ff5e2cae64c1af825a9bac90d908c66b05f2806f2b9c5803fceab68b9f32815b2fa4d8fad9cb609e1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}