{
  "manageEntity": {
    "action": "Save",
    "entityId": "1623654897",
    "entityType": "Track",
    "nonce": "0x939427399fb0992a3375acca7e992149c0796578855c90de7bcb2897036da044",
    "signature": "0x605d3e344cd2c6f3f9fd99c8f853052d57f882dd35149778d2c16dc0fadcd0a6098f1ea3a55707c91193dd896144f262761a52f99198dc9dc311a3b7cfdd184c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}