{
  "manageEntity": {
    "action": "Save",
    "entityId": "984620",
    "entityType": "Track",
    "nonce": "0x096389aaa9c6f7b0d135bef1bd64b422b743eb1974af7e07f33d31001fffc1a9",
    "signature": "0x1b34d13eba96c0adf258436ef59be16590e91d79944b7976937a8046a16c01b274cb465a248c29b76b458f0e40183355ee23197f7cfc9332faff6d0e92f9a6531c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}