{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894255961",
    "entityType": "Track",
    "nonce": "0x65b0c8c39a889d54d7b3273ee31c3c4ff5abb52a3eba8c31dadb54e75bc7e78c",
    "signature": "0x8c2b8b5e241e193102200ec83f7d2393ab56569ffdebb33ba1353976a2e89c7c0f39c1eca464faaec95dd08701faa3b41d4a88c05e4d742145fd05025da41f241c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}