{
  "manageEntity": {
    "action": "Save",
    "entityId": "1145043409",
    "entityType": "Track",
    "nonce": "0x4efbb4ebc5881fb20f100de0093cb62d464164419bd910e1629841c884526a64",
    "signature": "0x5ec1f6fd4e0f3964a2743cd4428e8b44ce7653f01ce516ba7af41ae5a76c52fa35fd7046858fef605f3eba031c5af6186a5a15bc6ddeb06482c2b52d66f6cff81b",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}