{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108808516",
    "entityType": "Track",
    "nonce": "0xc2901c0d6a60376d41c004094b7e3050fe5e3494c737db2211287cc994d7e8eb",
    "signature": "0x72f627cb2123e9723ffd9b457940e1396416ac002593cf98bd6b4545f8f745256f8b732e0a93402a3597e75f94aa289a84bd628188b3056bddc582b40056c5081c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}