{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915541522",
    "entityType": "Track",
    "nonce": "0xfff6ab861cfc7068647e26008d576f40d9d5759c376069839f1fc7f16bc44b28",
    "signature": "0xe3325fa510c315462b0165c493af0c980b95db30604931d4a7db9c2b47c3b4404fb24dadedbf94b59b46b9f5bfa10bb711822b80c13ec2f9f1b7cff3704ca4d51c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}