{
  "manageEntity": {
    "action": "Save",
    "entityId": "797695755",
    "entityType": "Track",
    "nonce": "0x5052c362d773aa264c1ab3b4e670da98e962a4e25046bcf6ace07743c1c96eb2",
    "signature": "0x589f1edb770b6a7ff062c1abbe043345f90eb3653480f599a2e0de5bc70067c075a02ed314525fbc4997abd5f184ec1da3abee72931548c4b4879bb32ef031361b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}