{
  "manageEntity": {
    "action": "Save",
    "entityId": "1163773465",
    "entityType": "Track",
    "nonce": "0xb7872302912c08bd35dbaf9b1f9837fcc50493e333da5e1f2f8215ecd897bc24",
    "signature": "0x1aa840cfc9d523db2048d5a6e138c6c0cfccbad0e597474841f2da7242b950bf1e79adcbfe8caad7a42b9a8aa1246888a3f468dcc0aa8939138a567839661dc31b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}