{
  "manageEntity": {
    "action": "Save",
    "entityId": "734216998",
    "entityType": "Track",
    "nonce": "0x0130393860b5041446089f7b80c0163169fe1c1ef0e7dc43993ceb5b87d48bb8",
    "signature": "0xcca398e82b2433cb26e9276ddd33bd8c5c389120e1da4c7aa8829e922f9542d820567a56e6ccbc1d864c9eea98e793d54cf6cf50ff2979470a2747be267d24c91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}