{
  "manageEntity": {
    "action": "Save",
    "entityId": "631576216",
    "entityType": "Track",
    "nonce": "0xefefd543a4695d21480859a63a175efa590fa1e973c19aeaa4a03ece967d05e9",
    "signature": "0x140ff13fdec41dd96c82a78c58acac8187468b89fa29041066e43d78d0c3ee293c00f2a5caaa6de8d392fc4228ac3c1007dc3b4dfa2cd56426e6bfe40ae2887b1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}