{
  "manageEntity": {
    "action": "Save",
    "entityId": "282273754",
    "entityType": "Track",
    "nonce": "0xefe082b45d513440f2ba6510556f7f039c979c662bea39629cb22654dd3dc1e8",
    "signature": "0xef5c9e751a6acd204caf12c21f23ee16d5c4042280770e5a7cb8e139b68b82174a3ead2eea313d07749c6c255a829ee5e9e2e8a016ad7ddaf908ee379c7b74531c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}