{
  "manageEntity": {
    "action": "Save",
    "entityId": "369746",
    "entityType": "Track",
    "nonce": "0x1e6a017c0e3e34ec96bb01ebcc9aa7e22521f7e64d9a68ce72eaf89a4beba77c",
    "signature": "0xbb70201434575a81217b2d81c7ea650b12824f6d2886678be304c5a5a93ccdd95d85920c9bb99d332dd57371c108f99533f25b33943951cb3ad466074e895d5f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}