{
  "manageEntity": {
    "action": "Save",
    "entityId": "277660",
    "entityType": "Track",
    "nonce": "0x141d9439f453094b9c148d881c2c100e7807e4162d8ec2b66e54f0121967a83d",
    "signature": "0x39c3cf6e9f8c505d746b69f47072bb726571188a98be4a23df9ecc5c8bf4de850e32cf406731f12178e43099b2987a539687be31b9bb42ce72658ffff4232d771b",
    "signer": "0x658704f5E9496548E3179a01fe1F54ac2a0b77a4",
    "userId": "188933"
  }
}