{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721483095",
    "entityType": "Track",
    "nonce": "0xf80d5e54d64861ed34a7fe0cd8988587d40802b53aaf47a969fafdb7e08c3216",
    "signature": "0x8e407b35a2bc70bf05f6e21735fd171451657aa72a2013e6018fb94bc6a4517b3f2e9756a1031922cc37de850754b385f002daf7acf358644e1bb1fd0a5ceb001b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}