{
  "manageEntity": {
    "action": "Save",
    "entityId": "253399073",
    "entityType": "Track",
    "nonce": "0xb1d873ff49786058ad88b1f2a2f7a1b791710447c268153e6d8965ce1c9aa599",
    "signature": "0x08ebe51d47aa506267d48baa8a0da1430585d19f40029933cec05030239c915939abed163b09d7ee9f2657878543582bfc4e42810389f34e46c528b72f0d1b981c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}