{
  "manageEntity": {
    "action": "Save",
    "entityId": "1604175974",
    "entityType": "Track",
    "nonce": "0x3387277b28bcc0f21493774cd37b22bc8c93aec0a2c646c0c6c746a0323dcd95",
    "signature": "0x00a173eb0175a273050bd1ef6366b9af5294d929c07a0a5c5ef193360c81ca8d7139cb07589c8ebf17832e7345e7c20904fb5c4b4a6005d169c9fa67123a39a41b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}