{
  "manageEntity": {
    "action": "Save",
    "entityId": "2102411293",
    "entityType": "Track",
    "nonce": "0x3f4cf574411aa0017db2f96290932573041a5a7232979f8a72fae50be51526a6",
    "signature": "0x8c52a0e82005c90f386206b5d77b97fb224fc92970cc034fa51a90e58ce6b92d3a59c166ddf518d48be4f78236855f982e45765c6faccf56779586fefa580c9d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}