{
  "manageEntity": {
    "action": "Save",
    "entityId": "1088510438",
    "entityType": "Track",
    "nonce": "0xbc41e975d2cb9a8e41ac35a2ec1141ac1aa07e493e908a35a824a75eae6e1048",
    "signature": "0x8f554045efec0629bc73fabe0ddaba496e95ded0365c6f07d762d240725af89258f4c27daadfe9e02c743b55b95cc98e637f6c663f6972e80409128a16b270c51b",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}