{
  "manageEntity": {
    "action": "Save",
    "entityId": "152788",
    "entityType": "Track",
    "nonce": "0x0e0485b01351117fdc98af1bc266ad459f3dccc4f72edb6be1ba23c13ecc1ef0",
    "signature": "0x29cbcb9ed832432a7dde6aa7cb7c1b2306810153796491a7996d44bc0ea426cf3fdbf8802559d25f7fb815db126b5943da93fd2741a6197496e81c02697547ac1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}