{
  "manageEntity": {
    "action": "Save",
    "entityId": "710462",
    "entityType": "Track",
    "nonce": "0xd29a9f8772feddb1e51f61cc9ffa0efaa9660aa37538e8cf4c94cf158410dea8",
    "signature": "0xcc65c68cd7d1bc7e0a23c6c2e728fb9c08f42cf521593ec930b323621a3a2dc76958aa6e3ee837dfa36baa0b650192e5478537e7cfc15c883524df35750724fd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}