{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594616083",
    "entityType": "Track",
    "nonce": "1785606589589415884",
    "signature": "0x05d7036d3128ff593aac677371cdd6aa6288cd03c848c1d5f73b1a997bb113725ff51f796c9afb54623983109fa4ad580e86c6bc906c10e27203f12b2ea42c041c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}