{
  "manageEntity": {
    "action": "Save",
    "entityId": "570833292",
    "entityType": "Track",
    "nonce": "0x4bb60f2c1b4b2648e17ae60530a6145e2a59f0b0bb4ff92385345024be15c78e",
    "signature": "0x222b32e20771ce83586a8b60d6007117149e8e71287f37c0bf2d1d64e30b09462cf9bbbf91609a798bcfbca7375d9e237174c771a82008f0a843d0ab2a79fe421b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}