{
  "manageEntity": {
    "action": "Save",
    "entityId": "1178453549",
    "entityType": "Track",
    "nonce": "1787798935897806861",
    "signature": "0x6eeb77c8807d7fe3d978acef2d82d7680f403127a48a5fdff121c7f364b84e066c1f105e819632576ed2094f5eff1bc1ea0147853b60f461f59d7790250ec1bd1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}