{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054204524",
    "entityType": "Track",
    "nonce": "0x4c335b1d2372374edef1f7ce4f814ab7cf7ec2ecac740c1dd010a6f4059be204",
    "signature": "0xabcc6c1ead4a0dc74532a0a167390c7dae4a1f8e676602f0ed26ad488d341a725e504fb6dacfa7d54bfe7f11072d816bed5d2a0eb9830e14d54b5a63f4373d001b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}