{
  "manageEntity": {
    "action": "Save",
    "entityId": "975255606",
    "entityType": "Track",
    "nonce": "0x83e1b3f9a3a1097a5078ffd29dc989c1c307802a250d447d8d8cb0781eb80778",
    "signature": "0x645943274147773f949f898927de7fd97796c519109f4dd5257cebb078fe40f434796e20b46e6040c3151b9ace7b44a224e7c14d7b1fdfaad985d5dad30f4b071c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}