{
  "manageEntity": {
    "action": "Save",
    "entityId": "918601418",
    "entityType": "Track",
    "nonce": "0xcfbf8dd992f48eabd75def180789dc9b89db87da970cba1ac1d62d5d4fa10e9a",
    "signature": "0x86e1ecf0f2dc43794cf3d62d2d2de38b8ee8f3b3867fce606b8b4d7ce400ae7542b0a044415b942298596b4f57f2f2201196d5e223445e53273e8ec6d4d098a11c",
    "signer": "0x8e38227DD54A2cCD0f3E18D72F07C5b54b9E7D14",
    "userId": "328851963"
  }
}