{
  "manageEntity": {
    "action": "Save",
    "entityId": "1173148119",
    "entityType": "Track",
    "nonce": "0x678bd8f016a3f1a3c437f5b2ca7be0299bc552b6095a6b4e14352e9b4c48886b",
    "signature": "0xc9d6d7758a50f5273fe5a71415b9704d5e68e388b9b11bbb79f530436fe76487337b7555616993a8bd43250722a27dd4042a29cdc6bb5dadfcdfbd41bc233f701c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}