{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408525274",
    "entityType": "Track",
    "nonce": "0xe9f013bf04a30cd2483f69ec18c2c66152ac97b440fdc770158d92dc178fe694",
    "signature": "0x5dcaf2d95ae46b6c48fc2d3aad1da022c5114787005ad6cd2bb1d7215543df3637d06f4b74c55bf0f230010a69cdd71d9618a7d297cb194258f1db98dedb33e51c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}