{
  "manageEntity": {
    "action": "Save",
    "entityId": "12986852",
    "entityType": "Track",
    "nonce": "0xf3ac986f84399b73443e66df137d9f6aeffd38946fed2d0b609de136dd6d09c2",
    "signature": "0x9ca7145c0de7d278f9d0fb106b04e37c774a2e6ea11cdade7810ed538926af8340225ae1e1d25afee7cb1d65e29ba3a31a245932eccc88b090716f9fa7b302501b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}