{
  "manageEntity": {
    "action": "Save",
    "entityId": "995530775",
    "entityType": "Track",
    "nonce": "0xc22b243b5cd5f00cf7bcfa65dbf46b57acd0ef00a68532bf3eae03cc90dac103",
    "signature": "0x5a11524f2d2f0535e25df8430d2b68a0f6793b3ccd16f50b89792d41d555506c1cb1e14d58606f1fe7bf40a3f6d69ae9ffd18d60b76d1900b5ef90a4f185aa541c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}