{
  "manageEntity": {
    "action": "Save",
    "entityId": "247922",
    "entityType": "Track",
    "nonce": "0x7ed0800b2617148af7c5281422e2b7587310959d2160207817a264ab2e534d89",
    "signature": "0x0ad1a35ba56fa1d057fde32edf862cabcd29533dbf9bcceba412b33d5d2fec8c5c8e843826c9dce150eb35ae4d374d37136715abe9338d86a65bf043d03f57b51b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}