{
  "manageEntity": {
    "action": "Save",
    "entityId": "1193429515",
    "entityType": "Track",
    "nonce": "0x551722aeb802f50b9a63b3afcd5fffb360488f5aec4e45a1c1d3c15addf9952b",
    "signature": "0x95d08cf5175949ec3543bdf5673b4a035b4fd07852084d6621f18ca02874713e65a64e6796faa297ffbe46fe28b9eefe37f2447bf3e4bc761394519ad6f9e6f21b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}