{
  "manageEntity": {
    "action": "Save",
    "entityId": "672433453",
    "entityType": "Track",
    "nonce": "0x505b8aaa7f8c6955823ceb29a7cb3c42e8043007870ea433bdbb9ab14c0bd759",
    "signature": "0x8a01ba92e338cc1f1552e02c0d5433269a9ca85005d459cbd7b0156f36fd203851161c307e6d736f917545d2595571698d72f58355a196e3cd93196ecb2551d61b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}