{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220805871",
    "entityType": "Track",
    "nonce": "0x0048f2b3af62e11397f3030c43102cd2214c9f57e273aa663e184d308b747b78",
    "signature": "0x40c3767a7e2d11c2042bd39ee29c8f1d9aa8d388e8d9fc0119cc127e50423d864109a1766c1b6e970a556a3009f2ef4b3fb1a0b9d746dc3229cf61fa91daf8031b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}