{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342273686",
    "entityType": "Track",
    "nonce": "0xc0f193b1f0e7111fea0e51e104e806311a518208bdd62874dc1c11a09719ec1b",
    "signature": "0xc7e26036c08c6b599e26c1bdb8c1edb1490a7dd562a777c8ffe2245e3b846baa01b3f2fc11028537f10c5b743919e748a83a0fe3bc7af8517c3f33befec3b25b1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}