{
  "manageEntity": {
    "action": "Save",
    "entityId": "150803786",
    "entityType": "Track",
    "nonce": "0x44294a697906705e489f2e5218105c187e1fe4934effbc62ee383bd6cc1ab935",
    "signature": "0x32789cae702644db2a5fa4005239825d22ef37bc956e919ef5ca3258f3119ed503082ce831239f915976d14a07f56e1c1451fb5c29877e5addfc49ed3e380fbd1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}