{
  "manageEntity": {
    "action": "Save",
    "entityId": "493095",
    "entityType": "Track",
    "nonce": "0x5f84bc31ebded73560bce47cabd968910d34034aedb0ce20f207e203741f4d69",
    "signature": "0x922e6f651238ad0ecff2da56770977943ca37bb57fcd194828ad70a9c5dae4c17b5762008fe18536dedeb0e5ed97ff2333bac825fdab0331d6f21a3bce049afb1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}