{
  "manageEntity": {
    "action": "Save",
    "entityId": "801380",
    "entityType": "Track",
    "nonce": "0xa0afbc5f4ff227c45a9a46ebac258c28ddbef38a559bdbd118cd5efc177b7bdd",
    "signature": "0x726a3b528454f7b804c23a3f568840d92fd31ae5ca22698c4d6cc5df50cc2b3875eea9c1ef06157dc973bba6adb89a543174a5382a2b997a8411c3e3d1f4c5c81c",
    "signer": "0xfeBBAF2B7d9F5bE3DAA34bEe70259f61ac4aB836",
    "userId": "139146722"
  }
}