{
  "manageEntity": {
    "action": "Save",
    "entityId": "812278843",
    "entityType": "Track",
    "nonce": "0x9e664454ac30830db7bbeeef31dfdda835c3409bf5a67a560864ca63acf95ad6",
    "signature": "0x33a199c1ac036e260a72aa59c8d0da82e2f3680dd9ec2a9a7106ea3e41b84c1230787645e811c012792c1badbb595504c560e2a7ced5727407305a672dc453f91b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}