{
  "manageEntity": {
    "action": "Save",
    "entityId": "419013737",
    "entityType": "Track",
    "nonce": "0xf9fa9559c6d36d6e8c9574188bbd330edf76a364bf5035dff76d30aebed8ab1f",
    "signature": "0xe617c96061abf06ca062774f246128c548a7e126a2eec011f6590d6a2814cbce0f48fb5c5c11748710d4c07de02d83000d0a56ab2846ac3864ea3c1bd94f11391b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}