{
  "manageEntity": {
    "action": "Save",
    "entityId": "364829312",
    "entityType": "Track",
    "nonce": "0xa3a327f3c1b8704123e95702b3a7dbf4e70081ad1ee58cd6385386696e494c65",
    "signature": "0x84b86a0be053ed87d6352a3679a326697d2fd34ae335f487712d22c85c726f533984585016f4fada72824a293ea4031fc73dcbc181400ec3962e04339f67de491b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}