{
  "manageEntity": {
    "action": "Save",
    "entityId": "474883",
    "entityType": "Track",
    "nonce": "0x9289d29b60958df3734472c37f4a3d76bd9f20233176db81fff71b695c428623",
    "signature": "0xc66d2b032ef35c17101ce4c465fbb3ba429b69ca554abc4d9b6c11ba0137f97937b9715392fcbd1bc7d8fea9cc280cebeca374f43b8ec61e64a6cd6183b8cf071b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}