{
  "manageEntity": {
    "action": "Save",
    "entityId": "1119475874",
    "entityType": "Track",
    "nonce": "0x422a8feb3df10f7d840d67e8b780c4740a2fd12da8d67cabf47be2df083237ea",
    "signature": "0x60b7c1b5d6897077b501bdfa774dd10270f256e5ac5f025255caf4300794eea043ae642dcd0f4f29be168d4623f994d5b3802a110b9fefc721207a39260c41d61c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}