{
  "manageEntity": {
    "action": "Save",
    "entityId": "964362631",
    "entityType": "Track",
    "nonce": "0x7c07eb761c3e5218b9c0060fe4d736b42587347a8b71e0ec72fd1d9d5e3c2a91",
    "signature": "0x6fb9d84a4b15de807f317e3f0938e55c84472293a144a4f5b086d39a02604a766ffc99d9211d33cc81fb3a59e4f940542ed591ce8de313b4963c07035dde7aac1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}