{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356945451",
    "entityType": "Track",
    "nonce": "0x2d5a3a8bf877fcaaa9c578fa199b15db225da979aec1cae14ea709abf219ccec",
    "signature": "0xf15bff0c5f525a4d7bc90e1b01bb9d716c395f60316e041578de7f82022a77741ce5c5df37c7722dca1ad85ee94bcbb9bd9cc7de082662bda9c1e35163ef617c1c",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}