{
  "manageEntity": {
    "action": "Save",
    "entityId": "330158747",
    "entityType": "Track",
    "nonce": "0x725e9de8f998f4dceb18430765b925f8473deb2aae3ad2c43532f1389aa2c795",
    "signature": "0xf89f69556799fd8c6fef980ffbf6017e8bc95c23c77ec82c8a2b2b0795f2a6460596fea8c132ffea0e2530db10cdeba1b84ac1f5539523318d10c6ba3c5b72221b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}