{
  "manageEntity": {
    "action": "Save",
    "entityId": "2025415198",
    "entityType": "Track",
    "nonce": "0x9e2bc2cba962edfa6f420d11e4d0463abbd4ed803a42929d125fcb1c97731306",
    "signature": "0x21d513612d65d02b23ed95c1ac097b433113a79eef1dc2246cb2ee21d36605f72c2835a1f000962823f7029cf457ba4c1e02b9a092a15d89d77a9741a9aa23731c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}