{
  "manageEntity": {
    "action": "Save",
    "entityId": "272131837",
    "entityType": "Track",
    "nonce": "0xedcf9d826d8662e1ba13fb6f87dacfcbf52e63fdc83f0ba4caaff39e9950b522",
    "signature": "0x101cb60cffe5016d98427f3a388beea546e934c84603985ba6a24c5405dd1a88128ee63843678b92d89d0d3c6429ac0de5dfe74cfc4ca212f9755c987b1ce0201c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}