{
  "manageEntity": {
    "action": "Save",
    "entityId": "1732041874",
    "entityType": "Track",
    "nonce": "0xa7bd98d039743358504ce395c9286b7f5bea3a1df8c57221d06f7c09681aa3b7",
    "signature": "0x3ed1bb08a878dca6b49ffdaa6ac51f38be5824157f5fb21def8017d195a5df293baff82acfc0de0ac13891b13c3f8cf45c7a32f187546ca576ac7bfa053731051b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}