{
  "manageEntity": {
    "action": "Save",
    "entityId": "855425314",
    "entityType": "Track",
    "nonce": "0x7df32bf66c9a9629d601c2a3cf54c8bab486fff43102d37681d9e5fb3fbe8c25",
    "signature": "0xe1b094992ee799707bff449234cdbfe0cf067330a313fb79108d02f4c8951f6819571dd79750919bed20932345466c48861fe16178da0d0bc5bc9936a59d5ac41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}