{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500368896",
    "entityType": "Track",
    "nonce": "0xa1edfa73779cbdfca53f806eb48a6678ec9feca6b42c20223f74f5e20966cf85",
    "signature": "0x6277a20e543d3949824ea71b865b91b61488af7bfe7c45ffdb29e77525027f151fa0d5dd49974c191479718ae1067d3bc6c6fde0202ca538116bdcb8f40e1a221b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}