{
  "manageEntity": {
    "action": "Save",
    "entityId": "214797",
    "entityType": "Track",
    "nonce": "0xdf9e97ba111584822d7633b7087c463354605dc5c6c8bb13d944c3e2a2a812d1",
    "signature": "0x33e60c8dfb1abb30c181453abbe15926cb4c0fd2fc6ba45f80051159bb88848c2bfbe56b9afb6971cf1a71db82acbd6d75895be367885ffe9b703e9b647761c41c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}