{
  "manageEntity": {
    "action": "Save",
    "entityId": "1542335732",
    "entityType": "Track",
    "nonce": "0x279211d17e0eb4d34f72c7410018140f3bc3607040644613b8af797776c4302d",
    "signature": "0xdf5fd8ed8874160a8c795820f2d78445a8659a00feca2a4eceac7db0a1f07f945049b26e3d68da6d6c9ee7db541e2c96e4de2ac908b3f04eb1891a70a77838c81c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}