{
  "manageEntity": {
    "action": "Save",
    "entityId": "584398927",
    "entityType": "Track",
    "nonce": "0x5b27b3f48710d4652c3b415dabcca378628d079a2d6f90fa1baad2f286694fcb",
    "signature": "0x8cb9a801d3c87da0afb341597a536e2d3508cf9ecd9c39ea769234ca8dd929731b1a1f1317d3044231508e6baa12e25490bd18848d2f002eec18344d34bcf2201b",
    "signer": "0xD24FfFB5C56D31307e1072d8DB324b7742FeF6E0",
    "userId": "882786016"
  }
}