{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831620671",
    "entityType": "Track",
    "nonce": "0xce5182476e53f960a7095003271b93691901710c99628c963e0e04610dc456dd",
    "signature": "0x27c24452b76fcb318c3b0f41f5201a4d4962751ed997f4caa558f973e40a439063f7c561dab270906003b9311e2b7d7dac83be3455d9a6959e0a8fd4199ca3b81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}