{
  "manageEntity": {
    "action": "Save",
    "entityId": "1219925392",
    "entityType": "Track",
    "nonce": "0x99e1c5bef535a54e7fc660212e495fcdf6bb1799edc40a4b7662f1dc3f79888f",
    "signature": "0xfacedc959c440ccbfae7e4888b77bcd965d9c16a63be246bcedaeec2d1485f8a2083e5805534df67108ea7b360a47ce60308ebfbb6aa837d24da39dd7e9faeed1b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}