{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030586",
    "entityType": "Track",
    "nonce": "0x5464c003f67f82f6234c37dcfe9e7772b5af35027b85f4998a2c8f72d56421fe",
    "signature": "0x8730244b15ad982768723ffc0a2a0e94c4200eb7909dd991f36388e4fc9266980f00a571a627f34bfaaa30d5979e23cebcbae627c35988adcd03a47072d3dc281c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}