{
  "manageEntity": {
    "action": "Save",
    "entityId": "804742415",
    "entityType": "Track",
    "nonce": "0xe9c81d16ec61509126c1bf145dd10f89d02fe55d9cfaf29594029a2b42c5fb2d",
    "signature": "0xc504ad61d03db228f150bd2a85e17b3c72bc1491f617181c41db159477d2934b4dd88a02a504999204287c363a14c3a2937c8e7ae2e47fd870b6134718155ed21b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}