{
  "manageEntity": {
    "action": "Save",
    "entityId": "516225910",
    "entityType": "Track",
    "nonce": "0x73b9ebf7268853aca8e1096f5f8ac1c4fcba211932ec8c04997204008b16dd92",
    "signature": "0x67d3744edb5f55e6ea5d80daf74ac54fee0fe40a6a55feb5dec6622380e500216ea84ffc6dc433bd068150454ea2383f89a84d205c40e2b2f27a960704a39d9c1b",
    "signer": "0x4a26E1fdd6FdeE62e6A343d231CF3700Bf1e26bb",
    "userId": "55875"
  }
}