{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203647114",
    "entityType": "Track",
    "nonce": "0x49b4ddec3067050e7fb101722098d244d7bba36c621b9d2c43fa1397cf834536",
    "signature": "0x7a3791c930bea04e668ba6fa515f2bd14c1ae7a3a4ff7e7c87a81143735795e3563274919149f36128540bed4e8d7ad908a94d55a33a2106d1589a494b863abd1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}