{
  "manageEntity": {
    "action": "Save",
    "entityId": "426294469",
    "entityType": "Track",
    "nonce": "0x1f1ab0c258929fe110da27c36abb9d7a6629a857eaad1805b25a2d9067242524",
    "signature": "0xf42cf8dd4a2763171a39aaac29002e4078537f7f74563400e0d0544ec73024da7ce3456b771a61ed4589c3338272be1b841092fb4a1174ba19ca5805978483821b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}