{
  "manageEntity": {
    "action": "Save",
    "entityId": "1287680042",
    "entityType": "Track",
    "nonce": "0xbb1ae2304a3aab98fe005439e9f4e66e9189b28920f7771458175c713789c1fe",
    "signature": "0x67504995e0476e459047d85ce3760d63ba75b4c309463d22de9138adbad8ee224c414ee817f26f1cebd8e2b313bdb83ff97a2d9f066d4ff4628ec532e4afc70a1c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}