{
  "manageEntity": {
    "action": "Save",
    "entityId": "771825985",
    "entityType": "Track",
    "nonce": "0x2cf765abf2680d627d618650880ef8e147907123fa04c3f619cfd6bd2153ef9d",
    "signature": "0x39a0bdd5c9484fb7a29e2189fef0b8c5d62a628be9d612ba015a42ec4dc320e4266da13696f458a935fed8856ded0d71adb348a2e26c414ab7acb609e86f962e1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}