{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906838005",
    "entityType": "Track",
    "nonce": "0x3286ab8e851a1dac5b287de260fab7db2a7ee1cfe6cda7169f8d5931cf730874",
    "signature": "0xfef05de004f53cb73833e229dbb4a9c1275a2fa88a5d3c10edd2d38fe54098342622af8d51a28a1229463ccdb34eaea6e3c8fe27f7b701a6e15899b12bd89bea1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}