{
  "manageEntity": {
    "action": "Save",
    "entityId": "532029847",
    "entityType": "Track",
    "nonce": "0x2d1b90c1ea3243d645a8e49a674dc7bd48a368b49ae3636987c4c4021a5c2112",
    "signature": "0x8b8e25d89cdaf9af19ef01c4b301fea0b71056c405c4d8aa54d7ff5c3adc77e67d3a83dc890324990abf3d6498abf22f30717f0d2e67c5752d5552c5cf0065cd1c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}