{
  "manageEntity": {
    "action": "Save",
    "entityId": "1547377344",
    "entityType": "Track",
    "nonce": "0x28e783893e5cc9d86c67927208b66e0c4cf21e2a945e435770b22891dd8f6c30",
    "signature": "0xe4b878eb44c8ee26b2a3e5e115ad7f3daf8fecf665093eba72a28b99c0e52e115cc4a681d10a655a9ad6d36ae5b75fc6f34dcce959c31845b35813f0718fa4511b",
    "signer": "0xbAdBF88a35ef36005fDD5ab7feC2d1561D200E55",
    "userId": "828403040"
  }
}