{
  "manageEntity": {
    "action": "Save",
    "entityId": "184326516",
    "entityType": "Track",
    "nonce": "0x38b921357af396bf22b819772a59de4ea58d689e129f9cd1f383eff178556a44",
    "signature": "0x2eadb28081f74aa8a4aa6cb6ca4a99d1097b1664babf08711650b3ca9175bc85261427d132a1f424825c41109505361e03ffa1863c0d1354bd39dd412c2bb1721c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}