{
  "manageEntity": {
    "action": "Save",
    "entityId": "258434184",
    "entityType": "Track",
    "nonce": "0xf711b7441a7dc827d2347e7d7a8b85de0fd903fa1efa912dd51880ae0bdbddbd",
    "signature": "0xb58d8287ac620a67582340fcd32791d712da97f7d0d3782285099fd00154e3ca7a0f5ada677c70413eee0a349b69b946114e54ed1c962ba01c10688d1253a3481c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}