{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131844155",
    "entityType": "Track",
    "nonce": "0xed8778102553ea392775e1f080a4d5147ab031617746e76e713ea6496cadbb2e",
    "signature": "0x1c9f5734d1ee2e63643d88d15d9c15f0ddedbaa81a1dd23e9de74041a8b02ebd79a7de0398e0e8b118bb32d3a17cf2c81209dc9171f717dcf2c452537abe70ee1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}