{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142844641",
    "entityType": "Track",
    "nonce": "0x3455a14294737b744c71ccb78811adf64087f134f7d5b4a93fd47aca4cbd5489",
    "signature": "0x4bc295bbb9a882d4e1dc6d734153ce5ccb3135da436ccba52cd5620c4b164a5d4f7764df18393ee047ccddce173a0f96b58581821cda90964333842eb77419e51b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}