{
  "manageEntity": {
    "action": "Save",
    "entityId": "217107785",
    "entityType": "Track",
    "nonce": "0xaf24b2a7f05d802bfbc58af61fc105fea2d8fb70d5a83ff8ae761be918689cac",
    "signature": "0x0926b0812c944e4fcffed7d8bf21e7b1f405b923869b9d7c6d39a3f3552aecdb031b200264ddc068b5dfb903d96960fb14237ec59cec20d1e1bee4927ee15fdb1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}